[Bug 1901505] [NEW] upgrade to 20.10 broke haswell laptop (no regular boot, no /dev/dri/card0)

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Laptop installed with kubuntu focal is not booting after upgrade to
20.10 (that apparently went smooth without any error).

- laptop hangs on boot
- no splash screen is displayed
- laptop can boot in recovery mode
- in this case you do not get /dev/dri/card0 - if X is started it starts on llvmpipe
- i915 driver is loaded, no error about it in journal or dmesg

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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upgrade to 20.10 broke haswell laptop (no regular boot, no /dev/dri/card0)
https://bugs.launchpad.net/bugs/1901505
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